Automatic welding device and method

Abstract

The present invention provides an automatic welding device and method, belonging to the field of welding technology. The automatic welding device comprises a mounting seat, the upper end of the mounting seat is fixedly connected to a plurality of support rods, and the upper side of the mounting seat is provided with a second hollow shell and a first hollow shell; a top plate, the top plate is fixedly connected to the upper ends of the plurality of support rods; a spherical leveling mechanism, the spherical leveling mechanism is arranged on the lower side of the top plate, and is used for leveling the second hollow shell, and finally the second hollow shell starts to rotate through a threaded rotating mechanism, and rubs with the first hollow shell, and the second hollow shell is connected to the first hollow shell through this friction welding method to form a complete hollow sphere. Through the above design, the welding of the hollow sphere is simpler and more automated.

Description

Technical Field

[0001] The invention belongs to the technical field of welding, and in particular relates to an automatic welding device and method. Background Art

[0002] Welding, also known as fusion, is a manufacturing process and technology that joins metals or other thermoplastic materials such as plastics by heating, high temperature or high pressure. There are many sources of energy for modern welding, including gas flame, arc, laser, electron beam, friction and ultrasound. In addition to being used in factories, welding can also be performed in a variety of environments, such as outdoors, underwater and in space. No matter where it is, welding may be dangerous to the operator, so appropriate protective measures must be taken when welding. The possible harm caused by welding to the human body includes burns, electric shock, visual impairment, inhalation of toxic gases, excessive ultraviolet radiation, etc.

[0003] The authorization publication number "CN109128612A" records "an automatic hollow ball welding device and its application, which solves the problem that some of the prior arts need to manually achieve hollow ball welding, and has the beneficial effect of being able to achieve welding of hollow balls of different sizes and automatic welding. The scheme is as follows: an automatic hollow ball welding device, including a movable clamping assembly, which clamps the hollow ball component from the outside, and the clamping assembly can drive the hollow ball component to rotate; a welding assembly, including a welding gun arranged on one side of the clamping assembly; a loading assembly, including a support for supporting the hollow ball component, and the loading assembly is movably arranged to deliver the hollow ball component to the clamping assembly."

[0004] At present, the manufacturing method of the hollow sphere is to first manufacture two hollow hemispheres, assemble the two hollow hemispheres by process, and then weld the two hemispheres, but this has the following problems: 1. When a hollow sphere needs to be welded, it is often necessary to align and correct the two semicircular hollow shells, and then fix them with tools. This step is currently mostly calibrated and aligned manually, which is very unstable and easily affects the subsequent welding quality; 2. During welding, heat welding is often performed manually, which often requires a lot of labor costs and time costs. In addition, the welding quality depends on the experience of the workers, and the quality varies, which affects the final production quality level of the hollow sphere. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic welding device and method, aiming to solve the problems mentioned in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions: An automatic welding device and method, comprising: A mounting seat, wherein a plurality of support rods are fixedly connected to the upper end of the mounting seat, and a second hollow shell and a first hollow shell are disposed on the upper side of the mounting seat; A top plate, the top plate being fixedly connected to the upper ends of the plurality of support rods; A spherical leveling mechanism, which is disposed on the lower side of the top plate and is used to level the second hollow shell; A shell fixing mechanism, the shell fixing installation mechanism is arranged on the upper side of the mounting seat, and is used to fix the second hollow shell and the first hollow shell by magnetic attraction; and The thread rotating mechanism is arranged on one side of the mounting seat and is used to drive the second hollow shell to rotate.

[0007] As a preferred solution of the present invention, the spherical leveling mechanism consists of an electric cylinder, a movable rod, a hydraulic shell and multiple groups of hydraulic leveling components. The electric cylinder is fixedly connected to the upper end of the top plate, the movable rod is connected to the electric cylinder, and the hydraulic shell is fixedly connected to the lower end of the movable rod. The multiple groups of hydraulic leveling components are all arranged on the lower side of the hydraulic shell, which are used to automatically level the movable rod.

[0008] As a preferred solution of the present invention, the shell fixing mechanism is composed of a fixed frame, a first swing arm, a sliding frame, a movable mounting shell, a fixed mounting shell and a plurality of magnetic blocks, the fixed frame is fixedly connected to the upper end of the mounting seat, the sliding frame is slidably arranged at the upper end of the mounting seat, the first swing arm and the second swing arm are respectively rotatably connected to the fixed frame and the sliding frame through a rotating shaft, the movable mounting shell and the fixed mounting shell are respectively fixedly connected to the upper ends of the second swing arm and the first swing arm, and the plurality of magnetic blocks are respectively arranged in the fixed mounting shell and the movable mounting shell.

[0009] As a preferred solution of the present invention, it also includes a moving drive mechanism, which is arranged on the upper side of the mounting seat and is fixedly connected to the sliding frame, and is used to drive the second hollow shell and the first rack to move.

[0010] As a preferred solution of the present invention, it also includes an angle adjustment mechanism, which is arranged on the upper side of the mounting seat and is used to simultaneously change the rotation angle of the first swing arm and the second swing arm when the sliding frame moves.

[0011] As a preferred solution of the present invention, a plurality of supporting legs are fixedly connected to the lower end of the mounting seat, and a reinforcing rod is fixedly connected to the circumferential surfaces of the plurality of supporting legs.

[0012] As a preferred solution of the present invention, a supplementary groove is provided on the circumferential surface of the hydraulic housing, and a card and a plate are movably hinged on the circumferential surface of the hydraulic housing, and a buckle is provided at one end of the card and the plate.

[0013] As a preferred solution of the present invention, the second hollow shell and the first hollow shell are respectively arranged in the movable installation shell and the fixed installation shell, and the second hollow shell and the first hollow shell are magnetically connected to a plurality of magnetic blocks.

[0014] As a preferred solution of the present invention, a fixing block is fixedly connected to the circumferential inner wall of the fixed installation shell, and a fixing groove is formed at the lower end of the first hollow shell, and the fixing groove matches the fixing block.

[0015] A method for using an automatic welding device comprises the following steps: S1: When the hollow sphere needs to be welded, the second hollow shell and the first hollow shell need to be placed in the movable mounting shell and the fixed mounting shell respectively. When the first hollow shell is placed in the fixed mounting shell, the position of the first hollow shell in the fixed mounting shell is fixed by engaging the fixing groove and the fixing block. After the second hollow shell is placed in the movable mounting shell, the posture of the second hollow shell is adjusted by controlling the movable rod, the hydraulic shell and multiple groups of hydraulic leveling components through the electric cylinder, so that the second hollow shell fits the inner wall of the movable mounting shell. S2: After the second hollow shell is attached to the inner wall of the movable mounting shell, the movable mounting shell and the second hollow shell are driven by the moving driving mechanism to approach the fixed mounting shell and the first hollow shell. While moving, the angles of the movable mounting shell and the fixed mounting shell are simultaneously controlled by the angle control mechanism, so that the movable mounting shell is finally rotated 90 degrees clockwise, and the first hollow shell is rotated 90 degrees counterclockwise, so that the second hollow shell and the first hollow shell are in a relative state and in close contact; S3: After the second hollow shell is completely in contact with the first hollow shell, the second hollow shell can start to rotate by itself through the threaded rotation mechanism, and then when the second hollow shell rotates, friction will be generated with the first hollow shell in contact with it. Through this friction welding method, the second hollow shell and the first hollow shell are welded together.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. When the hollow sphere needs to be welded, the second hollow shell and the first hollow shell are placed in the movable mounting shell and the fixed mounting shell respectively, and then the second hollow shell is automatically leveled by the sphere leveling mechanism, and the first hollow shell can be docked according to the fixed groove and the fixed block, and the first hollow shell is installed, and then the second hollow shell is controlled to approach the first hollow shell by the mobile driving mechanism and the angle control mechanism, and the angle is changed to be relative and tightly docked and fitted, and finally the second hollow shell starts to rotate by the threaded rotating mechanism, and rubs with the first hollow shell, and the second hollow shell is connected to the first hollow shell by this friction welding method to form a complete hollow sphere. The above design makes the welding of the hollow sphere simpler and more automated.

[0017] 2. Through the cooperation of the supplementary slot, the card and the plate, the hydraulic oil and other materials in the hydraulic shell can be supplemented and checked in real time, thereby improving the accuracy and sustainability of the use of the device. At the same time, the mounting base can be supported and stabilized by the supporting legs and reinforcing rods, thereby improving the placement stability of the device.

[0018] 3. For the welding of hollow spheres, this device uses friction welding instead of the previous heat welding. The advantage of this is that the welding speed is faster, the weld is tighter and more stable, and no additional welding materials are required, which greatly improves the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is the main stereoscopic view in the present invention; Figure 2 For the present invention Figure 1 A partial enlarged view of the middle A; Figure 3 It is the main cutaway stereogram in the present invention; Figure 4 For the present invention Figure 3 A partial enlarged view of point B in the middle; Figure 5 For the present invention Figure 3 A partial enlarged view of point C in the middle; Figure 6 It is a rear perspective view in the present invention.

[0020] In the figure: 1, mounting base; 101, supporting leg; 102, reinforcing rod; 103, supporting rod; 104, top plate; 105, electric cylinder; 106, movable rod; 107, hydraulic shell; 108, card and plate; 109, buckle; 110, transmission pipe; 111, movable shell; 112, piston plate; 113, piston rod; 114, leveling block; 115, pressure sensor; 2, fixed mounting shell; 201, first hollow shell; 202, magnetic block; 203, fixed frame; 204, first swing arm; 205, movable mounting shell; 206, second hollow shell; 207, first rack; 2 08, first gear; 209, penetration hole; 210, threaded groove; 211, linkage rod; 212, second rack; 213, second gear; 214, second swing arm; 215, fixed block; 3, movable groove; 301, screw rod; 302, limit groove; 303, limit block; 304, screw nut; 305, first motor; 4, assembly shell; 401, limit ring; 402, limit rod; 403, anti-drop plate; 404, driving rod; 405, second motor; 406, connecting plate; 407, telescopic rod; 408, mechanism shell; 409, thick tube rod; 410, thin insertion rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1 See also Figure 1-Figure 6 , the present invention provides the following technical solutions: An automatic welding device and method, comprising: A mounting base 1, wherein a plurality of support rods 103 are fixedly connected to the upper end of the mounting base 1, and a second hollow shell 206 and a first hollow shell 201 are disposed on the upper side of the mounting base 1; A top plate 104, the top plate 104 is fixedly connected to the upper ends of the plurality of support rods 103; A spherical leveling mechanism, which is disposed on the lower side of the top plate 104 and is used to level the second hollow shell 206; The ball leveling mechanism is composed of an electric cylinder 105, a movable rod 106, a hydraulic shell 107 and multiple groups of hydraulic leveling components. The electric cylinder 105 is fixedly connected to the upper end of the top plate 104, the movable rod 106 is connected to the electric cylinder 105, and the hydraulic shell 107 is fixedly connected to the lower end of the movable rod 106. Multiple groups of hydraulic leveling components are arranged on the lower side of the hydraulic shell 107, which are used to automatically level the movable rod 106. A summing plate is provided on the lower side of the hydraulic housing 107; Each set of hydraulic leveling components is composed of a transmission pipe 110, a movable shell 111, a pressure sensor 115, a piston rod 113, a piston plate 112 and a leveling block 114. The transmission pipe 110 is fixedly connected to the lower end of the hydraulic shell 107, and the transmission pipe 110 is fixedly connected to the summing plate, the movable shell 111 is fixedly connected to the lower end of the summing plate, the pressure sensor 115 is fixedly connected to the upper inner wall of the movable shell 111, the piston plate 112 is slidably connected in the movable shell 111, the upper end of the piston rod 113 movably passes through the lower inner wall of the movable shell 111, and is fixedly connected to the lower end of the piston plate 112, and the leveling block 114 is fixedly connected to the lower end of the piston rod 113; The shell fixing mechanism is arranged on the upper side of the mounting seat 1, and is used to fix the second hollow shell 206 and the first hollow shell 201 by magnetic attraction; The housing fixing mechanism is composed of a fixed frame 203, a first swing arm 204, a sliding frame, a movable mounting shell 205, a fixed mounting shell 2 and a plurality of magnetic blocks 202. The fixed frame 203 is fixedly connected to the upper end of the mounting seat 1, the sliding frame is slidably arranged at the upper end of the mounting seat 1, the first swing arm 204 and the second swing arm 214 are rotatably connected to the fixed frame 203 and the sliding frame respectively through a rotating shaft, the movable mounting shell 205 and the fixed mounting shell 2 are respectively fixedly connected to the upper ends of the second swing arm 214 and the first swing arm 204, and the plurality of magnetic blocks 202 are respectively arranged in the fixed mounting shell 2 and the movable mounting shell 205; It also includes a moving drive mechanism, which is disposed on the upper side of the mounting seat 1 and is fixedly connected to the sliding frame, and is used to drive the second hollow shell 206 and the first rack 207 to move; The mobile driving mechanism consists of a movable groove 3, a screw rod 301, a mounting groove, a first motor 305 and a screw rod nut 304. The movable groove 3 is opened at the upper end of the mounting seat 1, and the mounting groove is opened on one side inner wall of the movable groove 3. The first motor 305 is fixedly connected in the mounting groove. The screw rod 301 is rotatably connected between the inner walls on both sides of the movable groove 3, and the screw rod 301 is fixedly connected to the output end of the first motor 305. The screw rod nut 304 is threadedly connected to the circumferential surface of the screw rod 301, and the screw rod nut 304 is fixedly connected to the sliding frame.

[0023] It also includes an angle adjustment mechanism, which is disposed on the upper side of the mounting seat 1 and is used to simultaneously change the rotation angles of the first swing arm 204 and the second swing arm 214 when the sliding frame moves; The angle control mechanism is composed of a first gear 208, a first rack 207, a second gear 213, a second rack 212 and a linkage rod 211. The first gear 208 and the second gear 213 are respectively fixedly connected to one end of the two rotating shafts. The first rack 207 is fixedly connected to the upper end of the mounting base 1 and meshes with the first gear 208. The linkage rod 211 is fixedly connected to one end of the first swing arm 204. The second rack 212 is fixedly connected to one end of the linkage rod 211, and the second rack 212 meshes with the second gear 213. A threaded rotating mechanism, which is disposed on one side of the mounting seat 1 and is used to drive the second hollow shell 206 to rotate; The threaded rotating mechanism is composed of an assembly shell 4, two driving rods 404, a second motor 405, a connecting plate 406, a telescopic rod 407, a penetration hole 209, a threaded groove 210, a mechanism shell 408, a thick tube rod 409 and a thin insertion rod 410. The two driving rods 404 are fixedly connected to the first swing arm 204, the assembly shell 4 is fixedly connected to one end of the two driving rods 404, the mechanism shell 408 is fixedly connected to one side inner wall of the assembly shell 4, the second motor 405 is fixedly connected to one side inner wall of the assembly shell 4, and the connecting plate 406 is fixedly connected to the output end of the second motor 405. The telescopic rod 407 is fixedly connected to one end of the connecting plate 406, and one end of the telescopic rod 407 is movable through the inner wall of one side of the mechanism shell 408, the thick cylinder rod 409 is threadedly connected to the circumferential inner wall of the mechanism shell 408, the thin insertion rod 410 is fixedly connected to one end of the thick cylinder rod 409, and the circumferential surface of the thin insertion rod 410 is engraved with threads, the penetration hole 209 is provided at the lower end of the thread groove 210, the thread groove 210 is provided on the circumferential surface of the second hollow shell 206, and the inside thereof is also engraved with threads, and the internal threads of the thread groove 210 match the threads engraved on the circumferential surface of the thin insertion rod 410; The second hollow shell 206 and the first hollow shell 201 are respectively disposed in the movable installation shell 205 and the fixed installation shell 2, and the second hollow shell 206 and the first hollow shell 201 are magnetically connected to the plurality of magnetic blocks 202; A fixing block 215 is fixedly connected to the circumferential inner wall of the fixed installation shell 2 , and a fixing groove is formed at the lower end of the first hollow shell 201 , and the fixing groove matches the fixing block 215 .

[0024] In a specific embodiment of the present invention, when a hollow sphere needs to be manufactured, the second hollow shell 206 and the first hollow shell 201 are first placed in the movable mounting shell 205 and the fixed mounting shell 2 respectively. When the first hollow shell 201 is placed in the fixed mounting shell 2, it is clamped and sleeved on the outer surface of the fixed block 215 through the fixed slot. After the second hollow shell 206 is placed in the movable mounting shell 205, it is magnetically attracted by multiple magnetic blocks 202. At this time, in order to adjust the posture of the second hollow shell 206, the electric cylinder 105 can be started to move the movable rod 106, the hydraulic shell 107 and multiple components connected to its lower end downward. At this time, if the posture of the second hollow shell 206 is not flat enough or tilted, one end of the second hollow shell 206 will inevitably be tilted. At this time, some of the leveling blocks 114 will first contact the inclined end surface of the upper end of the second hollow shell 206. Since the multiple movable shells 111 all use the same hydraulic oil in the hydraulic shell 107, after some leveling blocks 114 are contacted and compressed, other leveling blocks 114 will protrude, and the piston rod 113 will push the piston plate 112 upward when compressed. At this time, the hydraulic oil in the movable shell 111 will squeeze the pressure sensor 115, and the pushed-out leveling blocks 114 will also drive the piston plate 112 to move downward, reducing the pressure on the pressure sensor 115. The multiple pressure sensors 115 are all connected to the external terminal and transmit their own pressure values ​​in real time. By judging whether the values ​​of the multiple pressure sensors 115 are uniform or equal, it can be In order to judge whether the posture of the second hollow shell 206 is correct, and in the process of the hydraulic shell 107 continuing to descend, the posture of the second hollow shell 206 will be gradually adjusted until it is adjusted to a correct state, and when the posture of the second hollow shell 206 is correct, the pressure values ​​detected by the multiple pressure sensors 115 should be the same or have a small difference, thereby completing the automatic leveling of the second hollow shell 206, and then the second hollow shell 206 is magnetically attracted by the magnetic block 202 to maintain its stable posture, and then the first motor 305 is started to rotate its output end, and the lead screw 301 is driven to rotate in the movable groove 3, so that the lead screw nut 304 and the sliding frame, the second hollow shell 206, the first rack 207, etc. are close to the fixed frame 203, and the sliding frame 206 and the second hollow shell 206 are moved closer to the fixed frame 203. The rightward movement of the movable frame will cause the first gear 208 to mesh with the first rack 207, causing the angle of the movable mounting shell 205 to rotate clockwise, and the movement of the sliding frame will also drive the second rack 212 to move through the linkage rod 211, causing the meshed second gear 213 to rotate counterclockwise. When the sliding frame moves to the maximum distance, the movable mounting shell 205 should rotate ninety degrees clockwise, and the fixed mounting shell 2 will rotate ninety degrees counterclockwise, so that the second hollow shell 206 and the first hollow shell 201 will be in a relative state and fit tightly together. After the fitting and docking is completed, the second motor 405 is started so that its output end drives the connecting plate 406, the telescopic rod 407, the thick barrel rod 409 and the thin insertion rod 410 to rotate, and the circumferential inner wall of the mechanism shell 408 is engraved with threads.The thread matches the thread engraved on the circumferential surface of the thick cylinder rod 409, which means that the thick cylinder rod 409 will rotate to the right in the machine shell 408, and at the same time drive the thin insertion rod 410 to rotate to the right. Since the second swing arm 214 rotates ninety degrees clockwise, the second swing arm 214 is parallel at this time, and the rotating thin insertion rod 410 contacts the thread groove 210 through the penetration hole 209, and the thread engraved on its circumferential surface is threadedly engaged with the thread groove 210, so that the thin insertion rod 410 and the second hollow shell 206 are completed relatively The second hollow shell 206 is connected to the first hollow shell 201 by friction welding, and the second hollow shell 206 is connected to the first hollow shell 201 by friction welding. In the direction, since the second hollow shell 206 and the first hollow shell 201 are already a whole, and the first hollow shell 201 is engaged with the fixing block 215 through the fixing groove, and the shapes of the fixing groove and the fixing block 215 are both rectangular, the output shaft of the second motor 405 rotates in the opposite direction, which will cause the thin insertion rod 410 to gradually rotate in the opposite direction and be withdrawn from the thread groove 210. When the thick barrel rod 409 gradually retreats, it will coincide with the threaded part of the mechanism shell 408 again, so that the thick barrel rod 409 is reset to its original position, and then the second hollow shell 206 and the fixed installation shell are connected. 2, the formed hollow sphere can be taken out, and the fixing groove and the thread groove 210 can be filled by subsequent pouring. Through the above design, the production of the hollow sphere is more convenient and automated, and basically no manual auxiliary operation is required. It should be noted that the specific type of the second motor 405 and the first motor 305 to be used is selected by the relevant technicians familiar with the field, and the above second motor 405 and the first motor 305 are all existing technologies, and this solution will not be repeated. ,

[0025] Preferably, a limiting groove 302 is provided on the lower inner wall of the movable groove 3, and the lower end of the screw nut 304 is fixedly connected to a limiting block 303. When the screw nut 304 moves, the limiting block 303 is driven to slide in the limiting groove 302, thereby improving the horizontal movement stability of the screw nut 304. Preferably, one end of the mounting seat 1 is fixedly connected to a limiting rod 402, one end of the limiting rod 402 is fixedly connected to an anti-drop plate 403, and the lower end of the assembly shell 4 is fixedly connected to a limiting ring 401. When the assembly shell 4 moves following the sliding frame, the limiting ring 401 will be driven to slide on the circumferential surface of the limiting rod 402, thereby improving the horizontal movement stability of the assembly shell 4.

[0026] For details, please refer to Figure 1-Figure 6The lower end of the mounting seat 1 is fixedly connected with a plurality of supporting legs 101, and the circumferential surfaces of the plurality of supporting legs 101 are fixedly connected with reinforcing rods 102. A supplementary groove is provided on the circumferential surface of the hydraulic shell 107, and a card and plate 108 is movably hinged on the circumferential surface of the hydraulic shell 107, and a buckle 109 is provided at one end of the card and plate 108.

[0027] In this embodiment: the mounting base 1 and multiple components can be conveniently supported by multiple supporting legs 101 and reinforcing rods 102, and the hydraulic oil in the hydraulic shell 107 can be conveniently replenished by replenishing grooves, cards and plates 108.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic welding device, characterized in that: include: A mounting seat (1), wherein a plurality of support rods (103) are fixedly connected to the upper end of the mounting seat (1), and a second hollow shell (206) and a first hollow shell (201) are provided on the upper side of the mounting seat (1); A top plate (104), the top plate (104) being fixedly connected to the upper ends of the plurality of support rods (103); A spherical leveling mechanism, the spherical leveling mechanism being arranged on the lower side of the top plate (104) and being used to perform a leveling process on the second hollow shell (206); A shell fixing mechanism, the shell fixing installation mechanism being arranged on the upper side of the installation seat (1) and being used for fixing the second hollow shell (206) and the first hollow shell (201) by magnetic attraction; and A threaded rotating mechanism, the threaded rotating mechanism being arranged on one side of the mounting seat (1) and being used to drive the second hollow shell (206) to rotate.

2. An automatic welding device according to claim 1, characterized in that: The spherical leveling mechanism comprises an electric cylinder (105), a movable rod (106), a hydraulic shell (107) and a plurality of groups of hydraulic leveling components. The electric cylinder (105) is fixedly connected to the upper end of the top plate (104), the movable rod (106) is connected to the electric cylinder (105), the hydraulic shell (107) is fixedly connected to the lower end of the movable rod (106), and the plurality of groups of hydraulic leveling components are arranged on the lower side of the hydraulic shell (107) and are used to automatically level the movable rod (106).

3. An automatic welding device according to claim 2, characterized in that: The shell fixing mechanism comprises a fixed frame (203), a first swing arm (204), a sliding frame, a movable mounting shell (205), a fixed mounting shell (2) and a plurality of magnetic blocks (202); the fixed frame (203) is fixedly connected to the upper end of the mounting seat (1); the sliding frame is slidably arranged on the upper end of the mounting seat (1); the first swing arm (204) and the second swing arm (214) are rotatably connected to the fixed frame (203) and the sliding frame respectively via a rotating shaft; the movable mounting shell (205) and the fixed mounting shell (2) are fixedly connected to the upper ends of the second swing arm (214) and the first swing arm (204) respectively; and the plurality of magnetic blocks (202) are respectively arranged in the fixed mounting shell (2) and the movable mounting shell (205).

4. An automatic welding device according to claim 3, characterized in that: It also comprises a moving drive mechanism, which is arranged on the upper side of the mounting seat (1) and is fixedly connected to the sliding frame, and is used to drive the second hollow shell (206) and the first rack (207) to move.

5. An automatic welding device according to claim 4, characterized in that: It also comprises an angle adjustment mechanism, which is arranged on the upper side of the mounting seat (1) and is used to simultaneously change the rotation angles of the first swing arm (204) and the second swing arm (214) when the sliding frame moves.

6. An automatic welding device according to claim 5, characterized in that: A plurality of support legs (101) are fixedly connected to the lower end of the mounting seat (1), and a reinforcing rod (102) is fixedly connected to the circumferential surfaces of the plurality of support legs (101).

7. An automatic welding device according to claim 6, characterized in that: A supplementary groove is provided on the circumferential surface of the hydraulic housing (107), and a card and a plate (108) are movably hinged on the circumferential surface of the hydraulic housing (107), and a buckle (109) is provided on one end of the card and the plate (108).

8. An automatic welding device according to claim 7, characterized in that: The second hollow shell (206) and the first hollow shell (201) are respectively arranged in the movable installation shell (205) and the fixed installation shell (2), and the second hollow shell (206) and the first hollow shell (201) are magnetically connected to a plurality of magnetic blocks (202).

9. An automatic welding device according to claim 8, characterized in that: A fixing block (215) is fixedly connected to the circumferential inner wall of the fixed installation shell (2), and a fixing groove is provided at the lower end of the first hollow shell (201), and the fixing groove matches the fixing block (215).

10. A method for using an automatic welding device, characterized in that: An automatic welding device as claimed in claim 9 is used, comprising the following steps: S1: When the hollow sphere needs to be welded, the second hollow shell (206) and the first hollow shell (201) need to be placed in the movable mounting shell (205) and the fixed mounting shell (2) respectively. When the first hollow shell (201) is placed in the fixed mounting shell (2), the position of the first hollow shell (201) in the fixed mounting shell (2) is fixed by engaging the fixing groove and the fixing block (215). After the second hollow shell (206) is placed in the movable mounting shell (205), the movable rod (106), the hydraulic shell (107) and the plurality of hydraulic leveling components are controlled by the electric cylinder (105) to adjust the posture of the second hollow shell (206) so that the second hollow shell (206) fits the inner wall of the movable mounting shell (205). S2: After the second hollow shell (206) is attached to the inner wall of the movable mounting shell (205), the movable mounting shell (205) and the second hollow shell (206) are driven by the moving driving mechanism to approach the fixed mounting shell (2) and the first hollow shell (201). While moving, the angle of the movable mounting shell (205) and the fixed mounting shell (2) are simultaneously controlled by the angle control mechanism, so that the movable mounting shell (205) is finally rotated ninety degrees clockwise, and the first hollow shell (201) is rotated ninety degrees counterclockwise, so that the second hollow shell (206) and the first hollow shell (201) are in a relative state and in close contact; S3: After the second hollow shell (206) is completely in contact with the first hollow shell (201), the second hollow shell (206) can start to rotate by itself through the threaded rotation mechanism, and then when the second hollow shell (206) rotates, friction is generated with the first hollow shell (201) in contact with it, and the second hollow shell (206) and the first hollow shell (201) are welded together through this friction welding method.

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